with a speed of 200km/h or above,Tianjin-Qinhuangdao-Shenyang Special Line,Fuzhou-Wenzhou Dedicated line, Shijiazhuang-Taiyuan special line, Changchun-Jilin special line, Hefei-Wuhan special line, Beijing-Qinhuangdao special line, Beijing-Guangzhou electrification transformation, Wuhan-Guangzhou electrification transformation,Zhejiang-Cangzhou electrification transformation, Hunan-Donghuan special line and other national key projects.

The market share of electrified railway composite insulators is as high as 70%. At present, more than 1 million electrified railway composite insulators and railway polymer insulators are used in China’s major railway lines.